QEL - DEDESCO 5935 Ottawa Street Richmond, Ontario, Canada, K0A 2Z0.

Transcription

1 QEL - DEDESCO 5935 Ottawa Street Richmond, Ontario, Canada, K0A 2Z0. Q5 TRANSMITTER Software Specification Document ModBus Protocol Name Signature Date Prepared: Xiangyang 2008/08 Reviewed: Checked: Approved: Revision: 1 2 A Software Version: V1.01 V1.01 V1.01 Date: 2008/ / /02 ECN No.: FIRST RELEASE Update FIRST RELEASE Approved: XY XY XY RA (Q5 Software Spec Level1).doc Page 1 of 6

2 1. MODBUS Protocol Supported By Q5 1.1 Serial Transmission Mode Modbus RTU Slave Mode Baud rate: 1200 to 57.6K, selectable from Baud Rate Setting in System Setting Menu. Byte parity: Odd, Even or None parity, selectable in Menu (Default is Even Parity) Data format: One start bit, 8 data bit, (one parity bit), one stop bit, LSB first. Frame Check: CRC check. 1.2 Function Code Supported by M-Controller #03 Read Holding Registers Function in Q5: Read inputs and outputs statuses and readings, such as Sensor readings and statuses Analog output current (ma x 10) Relay Statuses and Settings Buzzer Statuses and Settings Alarm Statuses and Settings Real Time Clock Events Records Attribute: Read Only. Broadcast is not supported. Q5 only suports the reading that number points is not more than 100 in one query. Query: Slave Address: xx (Default 0x01, check Address in Q5) Function code: 03 Starting addr. Hi: 000 Starting addr. Lo: xxx No. of points Hi: 000 No. of points Lo: xxx CRC check: xxxxh Example: to read all holding registers in Q5 (Address: 0x01) Query: [001] [003] [000] [000] [000] [004] [068] [009] in unsigned decimal RA (Q5 Software Spec Level1).doc Page 2 of 6

3 Modbus Name Instantaneous Gas_Concentration Without Decimal Holding Register for Running Data Address Table Description The concentration is 16 bits signed integer STEL 16 bits signed integer. 15 minutes averaging concentration without decimal TWA 16 bits signed integer 8 Hours Averaging Concentration without decimal Daily Peak 16 bits signed integer Peak reading during a day x ma Output 16 bits unsigned integer 4-20mA analog output, 100X ma value. The actual value is the value divided by 100. Unit is ma mv Output 16 bits unsigned integer 1-5VDC or 2-10VDC analog output, Unit is mv Board Tempearture 16 bits signed integer Q5 Sensor Board Temperature, 10X value. The actual value is the value divided by 10. Unit is C Working Status Register and Error Register Working status register in high 8 bits. 0x00: Monitoring_Mode 0x10: Zeroing_Cal_Mode 0x20: Span_Cal_Mode 0x30: T0_Cal_Mode 0x40: T1_Cal_Mode 0x50: Warmup_Mode 0x60: Restore_Factory_Mode 0x70: Programming_Mode 0x80: Menu_Mode Error Register is in low 8 bits. Bit0 = 1 : Thermistor Error Bit1 = 1 : 3.3VDC Low Bit2 = 1 : Sensor Board is offline Bit3 = 1 : Signal Low or Error Bit4 = 1 : Battery Low Bit5 = 1 : Calibration Error Bit6 = 1 : Concentration Overflow RA (Q5 Software Spec Level1).doc Page 3 of 6

4 40009 Alarm Status Register and Relay Status Register Bit7 = 1 : Others errors Alarm status register in high 8 bits. 0: OFF, 1: ON Bit0 : Alarm 1 status Bit1 : Alarm 2 status Bit2 : Alarm 3 status Bit3 : Alarm 4 status Bit4 : Alarm 5 status Bit5 : Alarm 6 status Bit6 : Alarm 7 status Bit7 : Alarm 8 status Relay stauts register is in low 8 bits. 0: OFF, 1: ON Bit0 : Relay1 status Bit1 : Relay2 status Bit2 : Relay3 status Buzzer Status Register and Decimal Position Buzzer status register in high 8 bits. 0: OFF, 1: ON Bit0 : Buzzer1 status Bit1 : Buzzer2 status Bit2 : Buzzer3 status Decimal Position in low 8 bits. If the byte = 0: The actual reading is Reading / 1 If the byte = 1: The actual reading is Reading / 10 If the byte = 2: The actual reading is Reading / 100 If the byte = 3: The actual reading is Reading / 1000 Others: N/A Q5 Real Time Clock in Seconds, Real Time Clock Seconds is a 32bit Long Integer. The register contains high 16 bits Q5 Real Time Clock is based on the number of seconds elapsed since 00:00:00 on Jan. 1, Q5 Real Time Clock in Seconds, Real Time Clock Seconds is a 32bit Long Integer. The register contains low 16 bits RA (Q5 Software Spec Level1).doc Page 4 of 6

5 Holding Register for Tranmsitter Settings Address Table Transmitter Software Version Transmitter Measure Span Software version major Number register in high 8 bits Software version minur number register in low 8 bits 16 bits unsigned integer Last Time CAL Last Time Calibration is a 32bit Long Integer. The time in seconds when the last calibration was performed. The register contains high 16 bits Last Time CAL is based on the number of seconds elapsed since 00:00:00 on Jan. 1, Last Time CAL Last Time Calibration is a 32bit Long Integer. The time in seconds when the last calibration was performed. The register contains low 16 bits Digital Pot Position Zeroing CAL Pot Position is in high 8 bits Span CAL Pot Position is in low 8 bits D/A Value at 4mA 16 bits unsigned integer D/A data output register value at 4mA output D/A Value at 20mA 16 bits unsigned integer D/A data output register value at 20mA output D/A Value at 1V 16 bits unsigned integer D/A data output register value at 1VDC output D/A Value at 5V 16 bits unsigned integer D/A data output register value at 5VDC output D/A Value at 2V 16 bits unsigned integer D/A data output register value at 2VDC output D/A Value at 10V 16 bits unsigned integer D/A data output register value at 10VDC output Detected Gas Name Max. 6 Characters First Character in high 8 bits Second Character in low 8 bits RA (Q5 Software Spec Level1).doc Page 5 of 6

6 40025 Detected Gas Name Third Character in high 8 bits Fourth Character in low 8 bits Detected Gas Name Fifth Character in high 8 bits Sixth Character in low 8 bits Gas Unit Name Max. 6 Characters First Character in high 8 bits Second Character in low 8 bits Gas Unit Name Third Character in high 8 bits Fourth Character in low 8 bits Gas Unit Name Fifth Character in high 8 bits Sixth Character in low 8 bits RA (Q5 Software Spec Level1).doc Page 6 of 6